Ryou Kimura

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Introduction: In next generation mobile communications systems, a very high-speed data transmission under severe frequency selective fading environments is required, particularly on the down link (baseto-mobile) [1]. Recently, orthogonal frequency division multiplexing (OFDM), that transmits many narrowband data-modulated orthogonal subcarriers in parallel,(More)
Spectrum-based rendering uses spectral distributions instead of just three RGB colors for representation of light sources and surface properties in rendering equation. Since, spectrum has a value at every visible wavelength, the spectrum-based rendering gives much accurate color computation compared to RGB-based rendering and it give us opportunity to(More)
Japanese lacquerware has been used from long ago in Japanese daily life. Makie is a famous surface decoration technique using metallic powders, color pigments, and lacquer. We propose a method for real-time rendering of Makie. The optical properties of the Makie surface is represented using Bidirectional Reflectance Distribution Function (BRDF). Sphere(More)
In this paper, we propose a new duplex scheme based on the multi-carrier transmission technology, multi-carrier division duplex (MCDD). MCDD exploits a time-spreading technique, the aim of which is reducing an impact of inter-link interference due to loss of orthogonality. When MCDD exploits the time-spreading with one of spreading factor, we regards this(More)
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